<template>
    <div>
        <h2>当前求和为:{{$store.state.sum}}</h2>
        <select v-model.number="n">
            <option value="1">1</option>
            <option value="2">2</option>
            <option value="3">3</option>
        </select>
        <button @click='increment'>+</button>
        <button @click='decrement'>-</button>
        <button @click='incrementIfOdd'>当前求和为奇数再+</button>
        <button @click='incrementWait'>等一等再+</button>

    </div>
</template>

<script>
export default {
    name:'Count',
    data() {
        return {
            n:1
        }
    },
    methods: {
        increment(){
            // this.sum += this.n
            this.$store.dispatch('jia',this.n)
            
        },
        decrement(){
            this.$store.dispatch('jian',this.n)
        },
        incrementIfOdd(){
            if(this.$store.state.sum % 2){
                 this.$store.dispatch('jia',this.n)
            }
        },
        incrementWait(){
            setTimeout(()=>{
              this.$store.dispatch('jia',this.n)
            },500)
        }
    }

}
</script>

<style>

</style>